The Kennecott Copperton concentrator is currently the bottleneck for the Kennecott operation, and several projects have been initiated to increase throughput. This increase in grinding circuit throughput has resulted in a coarser grind size, which has impacted flotation circuit recovery. Metso Outotec 300-m3 forced-air tank flotation cells are currently used in the rougher flotation circuit at the Copperton concentrator. Higher overall recoveries have been observed on the newer Outotec tank cells compared to the original 85-m3 self-aspirated flotation cells they replaced. However, coarse particle flotation response on these large, forced-air cells did not show encouraging results when compared to smaller previously installed cells. This coarse recovery loss has been attributed to the longer froth transport duration and transport distance on large cells (100 m3 and larger). Cell manufacturers addressed the risks of additional coarse particle losses in large cells by installing concentric circumferential launders and crowders (also called center launders). These are designed to reduce froth transport time and distance in the last cells in rougher stages where low residual floatable minerals cause a lack of froth mobility. The center launders also increase froth crowding, which helps to increase froth transport velocity and increases copper and molybdenum recoveries. A trial set of the center-launder retrofits were installed on the last three tank cells in one of the parallel rougher flotation rows at Copperton. The launder retrofits were installed at the end of October 2020 and monitored until March 2021. This six-month trial showed statistically significant improvements in copper and molybdenum flotation recoveries through the rougher circuit.